Adaptive nonlinear multivariate image filtering for mixed noise removal. - Kaijun Tang; Jaakko Astola; Yrjö Neuvo (ISCAS, 1993)

Multichannel edge enhancement in color image processing. - Kaijun Tang; Jaakko Astola; Yrjö Neuvo (IEEE Trans. Circuits Syst. Video Technol., 1994)

Nonlinear multivariate image filtering techniques. - Kaijun Tang; Jaakko Astola; Yrjö Neuvo (IEEE Trans. Image Process., 1995)

Multidirectional vector edge enhancers based on nonlinear operation. - Kaijun Tang; Yrjö Neuvo (Signal Process., 1996)